Led to change in the childcare world (e.g. children be able to see their caregivers in hospital) and greater stability in childcare practices (e.g. key workers in nurseries).
--> high ecological validity and practical use
+ Research support
A study with mothers with depression found a higher percentage of their children were insecurely attached compared to non-depressed mothers.
--> supports the connection between attachment and mental conditions
+ Long term effects
A study on women who had experienced seperation from their mothers and found them to have a higher chance of developing mental health issues.
- Many people experience mental health conditions that are not due to their early attachments so there must be other reasons for this